Quantum imaging with undetected photons

We present principles of quantum imaging with undetected photons (QIUP) and show modifications we made to the nonlinear interferometer for QUIP in order to use off-axes holography for faster image reconstruction. We present images made by off-axes quantum holography (OAQH) and discuss image capabilities of the system. In this work we use a pair of quantum correlated photons, generated by spontaneous parametric down-conversion in a non-linear crystal; one photon form a pair interacts with object, and another is detected. In our system both photons are in near infra-red, but by slight modifications they will be in different spectral regions, interacting photons in mid infra-red, detected photons in visible or near infra-ed. This opens very useful applications of QIUP for imaging and sensing in MIR.